1 // Copyright 2011 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 var e = new Error(); 29 assertFalse(e.hasOwnProperty('message')); 30 Error.prototype.toString = Object.prototype.toString; 31 assertEquals("[object Error]", Error.prototype.toString()); 32 assertEquals(Object.prototype, Error.prototype.__proto__); 33 34 // Check that error construction does not call setters for the 35 // properties on error objects in prototypes. 36 function fail() { assertTrue(false); }; 37 ReferenceError.prototype.__defineSetter__('stack', fail); 38 ReferenceError.prototype.__defineSetter__('message', fail); 39 ReferenceError.prototype.__defineSetter__('type', fail); 40 ReferenceError.prototype.__defineSetter__('arguments', fail); 41 var e0 = new ReferenceError(); 42 var e1 = new ReferenceError('123'); 43 assertTrue(e1.hasOwnProperty('message')); 44 assertTrue(e0.hasOwnProperty('stack')); 45 assertTrue(e1.hasOwnProperty('stack')); 46 assertTrue(e0.hasOwnProperty('type')); 47 assertTrue(e1.hasOwnProperty('type')); 48 assertTrue(e0.hasOwnProperty('arguments')); 49 assertTrue(e1.hasOwnProperty('arguments')); 50 51 // Check that the name property on error prototypes is read-only and 52 // dont-delete. This is not specified, but allowing overwriting the 53 // name property with a getter can leaks error objects from different 54 // script tags in the same context in a browser setting. We therefore 55 // disallow changes to the name property on error objects. 56 assertEquals("ReferenceError", ReferenceError.prototype.name); 57 delete ReferenceError.prototype.name; 58 assertEquals("ReferenceError", ReferenceError.prototype.name); 59 ReferenceError.prototype.name = "not a reference error"; 60 assertEquals("ReferenceError", ReferenceError.prototype.name); 61 62 // Check that message and name are not enumerable on Error objects. 63 var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name'); 64 assertFalse(desc['enumerable']); 65 desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message'); 66 assertFalse(desc['enumerable']); 67 68 var e = new Error("foobar"); 69 desc = Object.getOwnPropertyDescriptor(e, 'message'); 70 assertFalse(desc['enumerable']); 71 desc = Object.getOwnPropertyDescriptor(e, 'arguments'); 72 assertFalse(desc['enumerable']); 73 desc = Object.getOwnPropertyDescriptor(e, 'type'); 74 assertFalse(desc['enumerable']); 75 desc = Object.getOwnPropertyDescriptor(e, 'stack'); 76 assertFalse(desc['enumerable']); 77 78 // name is not tested above, but in addition we should have no enumerable 79 // properties, so we simply assert that. 80 for (var v in e) { 81 assertUnreachable(); 82 } 83
